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authorkwolekr <kwolekr@minetest.net>2014-12-30 12:30:14 -0500
committerkwolekr <kwolekr@minetest.net>2014-12-30 12:30:42 -0500
commita3d7203be5777010f13bf5465667028b920f4a29 (patch)
tree3bf4e2ac507f299c5043a20a56aed7a74ca93f14 /games/minimal/mods/default/textures/default_tnt_top.png
parent3d29be24e089b1c267409f05b897ce3f03e99a07 (diff)
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Fix map parameter load order
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generated by cgit v1.2.3 (git 2.39.1) at 2025-03-11 07:14:07 +0000
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--trackplacer.lua
--holds code for the track-placing system. the default 'track' item will be a craftitem that places rails as needed. this will neither place or change switches nor place vertical rails.

local print=function(t, ...) minetest.log("action", table.concat({t, ...}, " ")) minetest.chat_send_all(table.concat({t, ...}, " ")) end

--all new trackplacer code
local tp={
	tracks={}
}

function tp.register_tracktype(nnprefix, n_suffix)
	tp.tracks[nnprefix]={
		default=n_suffix,
		single_conn={},
		double_conn={},
		--keys:conn1_conn2 (example:1_4)
		--values:{name=x, param2=x}
		twcycle={},
		twrotate={},--indexed by suffix, list, tells order of rotations
		modify={}
	}
end
function tp.add_double_conn(nnprefix, suffix, rotation, conns)
	local nodename=nnprefix.."_"..suffix..rotation
	for i=0,3 do
		tp.tracks[nnprefix].double_conn[((conns.conn1+4*i)%16).."_"..((conns.conn2+4*i)%16)]={name=nodename, param2=i}
		tp.tracks[nnprefix].double_conn[((conns.conn2+4*i)%16).."_"..((conns.conn1+4*i)%16)]={name=nodename, param2=i}
	end
	tp.tracks[nnprefix].modify[nodename]=true
end
function tp.add_single_conn(nnprefix, suffix, rotation, conns)
	local nodename=nnprefix.."_"..suffix..rotation
	for i=0,3 do
		tp.tracks[nnprefix].single_conn[((conns.conn1+4*i)%16)]={name=nodename, param2=i}
		tp.tracks[nnprefix].single_conn[((conns.conn2+4*i)%16)]={name=nodename, param2=i}
	end
	tp.tracks[nnprefix].modify[nodename]=true
end

function tp.add_worked(nnprefix, suffix, rotation, cycle_follows)
	tp.tracks[nnprefix].twcycle[suffix]=cycle_follows
	if not tp.tracks[nnprefix].twrotate[suffix] then tp.tracks[nnprefix].twrotate[suffix]={} end
	table.insert(tp.tracks[nnprefix].twrotate[suffix], rotation)
end


--[[
	rewrite algorithm.
	selection criteria: these will never be changed or even selected:
	- tracks being already connected on both sides
	- tracks that are already connected on one side but are not bendable to the desired position
	the following situations can occur:
	1. there are two more than two rails around
		1.1 there is one or more subset(s) that can be directly connected
			-> choose the first possibility
		2.2 not
			-> choose the first one and orient straight
	2. there's exactly 1 rail around
		-> choose and orient straight
	3. there's no rail around
		-> set straight
]]
function tp.find_already_connected(pos)--TODO vertical calculations(check node below)
	local function istrackandbc(pos, conn)
		local cnode=minetest.get_node(advtrains.dirCoordSet(pos, conn))
		local bconn=(conn+8)%16
		if advtrains.is_track_and_drives_on(cnode.name, advtrains.all_tracktypes) then
			local cconn1, cconn2=advtrains.get_track_connections(cnode.name, cnode.param2)
			return cconn1==bconn or cconn2==bconn
		end
		return false
	end
	local dnode=minetest.get_node(pos)
	local dconn1, dconn2=advtrains.get_track_connections(dnode.name, dnode.param2)
	local t={[true]="true", [false]="false"}
	if istrackandbc(pos, dconn1) and istrackandbc(pos, dconn2) then return dconn1, dconn2
	elseif istrackandbc(pos, dconn1) then return dconn1
	elseif istrackandbc(pos, dconn2) then return dconn2
	end
	return nil
end
function tp.rail_and_can_be_bent(originpos, conn, nnpref)
	local pos=advtrains.dirCoordSet(originpos, conn)
	local newdir=(conn+8)%16
	local node=minetest.get_node(pos)
	local tr=tp.tracks[nnpref]
	if not advtrains.is_track_and_drives_on(node.name, advtrains.all_tracktypes) then
		return false
	end
	--rail at other end?
	local adj1, adj2=tp.find_already_connected(pos)
	if adj1 and adj2 then
		return false--dont destroy existing track
	elseif adj1 and not adj2 then
		if tr.double_conn[adj1.."_"..newdir] then
			return true--if exists, connect new rail and old end
		end
		return false
	else
		if tr.single_conn[newdir] then--just rotate old rail to right orientation
			return true
		end
		return false
	end
end
function tp.bend_rail(originpos, conn, nnpref)
	local pos=advtrains.dirCoordSet(originpos, conn)
	local newdir=(conn+8)%16